Although I live 5 miles away from MAN, I would certainly use LPL more often if the ground transportation was much better.
Using MAN can be a pretty grim experience from a passenger perspective, especially if using the depressing T1. Walkways & lifts broken, lights out, security queues, no seating in eateries, baggage belts broken, passenger info screens not updated etc etc. certainly, if you lived between the two, I'd know which way I'd prefer to go.